Ionization and dissociation of pentafluorosulfur chloride by electron impact

Vacuum-UV and electron dissociative ionisation studies of SF5Cl

“…4) fit well to single-threshold functions, and their threshold energies are determined to be 12.65 ± 0.02 and 15.38 ± 0.09 eV, respectively. These values are significantly lower than those of the early work of Harland and Thynne (13.2 and 15.9 eV, respectively) [11], probably reflecting the improved sensitivity of this apparatus over earlier electron-ionisation spectrometers. However, they are greater than the AE 298 values of these ions from photon-induced TPEPICO [this work] or PIMS spectroscopy [12], possibly reflecting the step function, and hence much steeper rise in cross section at threshold for a photon-induced reaction.…”

“…There have been no photoelectron studies under threshold conditions. The positive fragment ions formed by electron ionisation and photoionisation mass spectrometry (PIMS) have been studied in the range 12-20 eV [11,12], but no spectra have been recorded under coincidence conditions. It has not therefore been possible to correlate appearance of certain fragment cations with dissociation of a particular electronic state of SF 5 Cl + .…”

“…Inner-shell photoabsorption has been studied in the range 160-210 eV [13] and in the sulfur and chlorine K-edge region of 2400-3100 eV [14]. There have been two earlier studies of the fragment anions formed from low energy (E < 10 eV) electron attachment to SF 5 Cl [11,15], in addition to the recent study of Braun et al mentioned above [4]. There has been no study to date of ion-pair production following VUV photoexcitation of SF 5 Cl (e.g.…”

A study of the gas phase reactions of various cations with two derivatives of SF6; SF5CF3 and SF5Cl

“…This is not consistent with the reported photoionisation data for SF 5 35 with an appearance energy of 15.9 eV, and is known to be a product of the dissociative photoionisation of SF 5 Cl, 30,36 the ion is first observed at a photon energy of 14.76 eV. This places an upper bound on the energy for: …”

Vacuum Ultraviolet Negative Photoion Spectroscopy of SF5Cl

“…A recent crossed beam study of SF 5 Cl with low-energy electrons in the range 0−14 eV 15 has clarified inconsistencies arising from two earlier studies. 16,17 As in the thermal experiment, electron attachment is dissociative with SF 5 − being the dominant anion at low electron energies, but resonances forming F − , Cl − and FCl − are now observed at E > 3 eV. The experimental study by van Doren et al…”